Question on Correct Fit for Bon4

Hi, everyone. I'm new to the site and was wondering if someone might just give me some tips. I just got the Bon4 after using the CB-6000 for awhile. I couldn't wear the 6000 for long because I'd start to get edema on the underside of my tip after a day or two. With the smaller cage on the Bon4, I really have to pack everything in there to get it on, but my length itself is pretty much perfect. Is this safe for long term? I know it's sort of a medical question, but if there's anyone out there who did this and ended up having problems, I'd appreciate a heads-up. I could wear the bigger cage, but I only fill up half the cage when soft and it doesn't really prevent anything since I'm about as long as the cage when stiff. I'd love any advice people could give.